JVC UX-GD6M User manual
SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MB408
2005/6
MICRO COMPONENT SYSTEM
MB40820056
UX-GD6S,UX-GD6M
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
SUPER VIDEO
CA-UXGD6S CA-UXGD6MSP-UXGD6S SP-UXGD6S SP-UXGD6M SP-UXGD6M
Area suffix
A ------------------------ Australia
US ------------------------ Singapore
UT ---------------------------- Taiwan
UW ----------- Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UG --- Turkey,South Africa,Egypt
UN ----------------------------- Asean
UX-GD6S
Area suffix
UX-GD6M
UB ---------------------- Hong Kong
UF ------------------------------ China
UP ----------------------------- Korea
UT ---------------------------- Taiwan
UG --- Turkey,South Africa,Egypt
1-2 (No.MB408)
SPECIFICATION
CA-UXGD6S (for UX-GD6S)/CA-UXGD6M (for UX-GD6M)
Speakers-SP-UXGD6S (for UX-GD6S)
Speakers-SP-UXGD6M (for UX-GD6M)
Designs & specifications are subject to change without notice.
Amplifier section Output Power 100 W (50 W + 50 W) at 6 Ω(10% THD)
Audio Input AUX 400 mV/50 kΩ(at "AUX LVL1")
200 mV/50 kΩ(at "AUX LVL2")
Digital output DVD OPTICAL DIGITAL OUT: -21 dBm to -15 dBm (660 nm ±30 nm)
Video output Color system: NTSC or PAL (interlaced/progressive)
VIDEO (composite) 1 V(p-p)/75Ω
S-VIDEO Y (luminance): 1 V(p-p)/75Ω
C (chrominance, burst): NTSC: 0.286 V(p-p)/75Ω, PAL: 0.3 V(p-p)/75Ω
COMPONENT (Y): 1 V(p-p)/75Ω
(PB/PR): 0.7 V(p-p)/75Ω
Speaker impedance 6Ω- 16Ω
Tuner section FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz intervals)
530 kHz - 1 710 kHz (at 10 kHz intervals)
[For Saudi Arabia only]
531 kHz - 1 602 kHz (at 9 kHz intervals)
530 kHz - 1 600 kHz (at 10 kHz intervals)
Tape section Frequency response 60 Hz - 14 000 Hz
Wow and flutter 0.15 % (WRMS)
Disc player section Region codes Middle East: 2
South East Asia: 3
Central and South America: 4
Playable disc DVD Video/DVD Audio
CD/VCD/SVCD
CD-R/CD-RW (CD/SVCD/VCD/MP3/JPEG format)
DVD-R (DVD Video format)
DVD-RW/DVD-ROM/DVD-RAM (DVD-VR format)
Dynamic range 80 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
General Power requirement AC 110 V/AC 127V/AC 220 V - AC 230 V
(adjustable with the voltage selector), 50 Hz/60 Hz
Power consumption 95 W (at operation)
4 W (on standby)
Dimensions (approx.) 170 mm ×240 mm ×361 mm (W/H/D)
Mass (approx.) 5.6 kg
Speaker units Tweeter 4 cm cone ×1
Woofer 13.5 cm cone ×1
Impedance 6Ω
Dimensions (approx.) 165 mm ×283.5 mm ×249 mm (W/H/D)
Mass (approx.) 2.8 kg each
Speaker units Tweeter 4 cm cone ×1
Woofer 12 cm cone ×1
Impedance 6Ω
Dimensions (approx.) 145 mm ×240 mm ×201 mm (W/H/D)
Mass (approx.) 2.2 kg each
(No.MB408)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
1-4 (No.MB408)
1.5 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.6 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Short land section
Connector
Traverse mechanism assembly
DVD pickup
Card wire
(No.MB408)1-5
1.8 Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABELS
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
WARNING LABEL
1-6 (No.MB408)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB408)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs.1 to 3)
(1) From the back side of the main body, remove the six
screws Aattaching the metal cover. (See Fig.1.)
(2) From the both sides of the main body, remove the two
screws Battaching the metal cover. (See Figs.2 and 3.)
(3) From the top sides of the main body, remove the two
screws Battaching the metal cover. (See Figs.2 and 3.)
(4) Remove the metal cover in the direction of the arrow while
extending the lower sections of the metal cover. (See
Figs.2 and 3.)
Reference:
Remove the microphone volume knob from the top side of the
metal cover at the same time.
Fig.1
Fig.2
Fig.3
Metal cover
A
A
AA
Metal cover
B
B
Metal cover
B
B
Microphone volume knob
1-8 (No.MB408)
3.1.2 Removing the front panel assembly
(See Figs.4 to 6)
• Remove the metal cover.
(1) From the bottom side of the main body, remove the two
screws Cattaching the front panel assembly. (See Fig.4.)
(2) From the right side of the main body, push the slide cam
and pull the tray assembly out of the main body in the di-
rection of the arrow 1. (See Fig.5.)
(3) Remove the tray fitting from the tray assembly in the direc-
tion of the arrow 2 and push the tray assembly in the main
body. (See Fig.5.)
(4) Release the claws aand claws band remove the front pan-
el assembly toward the front. (See Figs.4 to 6.)
(5) Disconnect the card wire from the connector CN730 on the
micom board. (See Fig.6.)
Fig.4
Fig.5
Fig.6
Front panel assembly
C
C
a
a
1
2
Front panel assembly
Tray assembly
Tray fitting
Slide cam
b
Micom board
CN730 b
(No.MB408)1-9
3.1.3 Removing the rear cover
(See Fig.7)
• Remove the metal cover.
(1) From the back side of the main body, remove the screw D
attaching the rear cover.
(2) Release the joint sections cand remove the rear cover.
Fig.7
D
c
Rear cover
c
1-10 (No.MB408)
3.1.4 Removing the cassette chassis assembly
(See Figs.8 to 10)
• Remove the metal cover and rear cover.
(1) Remove the two screws Eattaching the cassette chassis
assembly. (See Fig.8.)
(2) From the both sides of the main body, release the joints d
and lift the cassette chassis assembly in the direction of the
arrow. (See Figs.9 and 10.)
(3) From the right side of the main body, disconnect the card
wires from the connectors (CN701, CN702, CN720) on the
foraward side of the micom board. (See Fig.10.)
Fig.8
Fig.9
Fig.10
E
d
Cassette chassis assembly
Cassette chassis assembly
d
CN702
CN701
Micom board
CN720
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